Gabriel Sandu
Gabriel Sandu

Senior Full Stack Engineer

Actively looking · Member since 5 Oct 2026
Location
Bucharest, Romania
Desired salary
Unspecified
Work preference
Remote Only
Experience level
Senior

About

Professional summary

I am a Senior Full Stack Engineer with more than 12 years of international experience building scalable web applications, backend platforms, cloud infrastructure, and AI-powered products.

I specialize in TypeScript, JavaScript, Python, Node.js, React, Next.js, and modern backend frameworks including NestJS, Django, FastAPI, and Laravel. I build responsive frontend experiences alongside reliable, high-performance server-side systems.

I have extensive experience designing REST and GraphQL APIs, distributed systems, microservices, event-driven workflows, real-time applications, and multi-tenant SaaS platforms. I work with relational and NoSQL databases and focus on scalable data modeling and query performance.

I deploy and operate applications using AWS, Azure, GCP, Docker, Kubernetes, Terraform, and automated CI/CD pipelines. I apply secure authentication, authorization, observability, testing, and OWASP-aligned engineering practices throughout delivery.

I also build AI-enabled applications using OpenAI APIs, RAG pipelines, embeddings, vector databases, LangChain, LangGraph, and agent-based workflows. I enjoy leading technical discussions, mentoring engineers, conducting code reviews, and turning product requirements into maintainable technical solutions.

Skills

65 capabilities

Tech stack & tools

Working toolkit

Experience

Career history

Senior Full Stack Engineer & AI Engineer Nils Digital

I design and develop production-grade full-stack and AI-powered applications using TypeScript, Python, React, Next.js, Node.js, NestJS, FastAPI, and Django. I build responsive frontend systems, backend services, asynchronous workflows, REST and GraphQL APIs, real-time communication, and third-party integrations.

I architect scalable multi-tenant SaaS and event-driven systems using microservices, RabbitMQ, Kafka, PostgreSQL, MongoDB, MySQL, Redis, Prisma, and Drizzle ORM. I deploy cloud-native workloads on AWS, Azure, and GCP using Docker, Kubernetes, Terraform, and CI/CD pipelines, while leading architecture decisions, code reviews, performance improvements, and technical mentoring.

I build LLM-powered capabilities with OpenAI APIs, RAG pipelines, embeddings, vector databases, LangChain, LangGraph, and agent-based workflows. I also implement OAuth 2.0, JWT, RBAC, and OWASP-aligned security practices.

Software Engineer Minsait

I developed and maintained full-stack web applications using JavaScript, TypeScript, React, Vue.js, Angular, Node.js, Express.js, and Python. I created reusable responsive frontend components and designed RESTful and GraphQL APIs for frontend applications, external integrations, and internal business services.

I built backend services with Node.js, Express.js, and Django, and designed and optimized data models across PostgreSQL, MySQL, MongoDB, and Redis. I implemented real-time functionality with WebSockets and Socket.IO and contributed to microservice-based application architectures.

I containerized applications with Docker, supported cloud deployment workflows, and maintained CI/CD automation for testing and releases. I also contributed automated unit, integration, and end-to-end testing, code reviews, debugging, estimation, and Agile/Scrum delivery.

Software Developer Ericsson

I developed software applications and backend services for complex, data-driven systems using Django and Express.js. I worked across full-stack components with JavaScript, TypeScript, Python, Node.js, AngularJS, Vue.js, and modern web technologies.

I built and maintained scalable APIs and application integrations while working with structured and unstructured data in MySQL and MongoDB. I collaborated with engineers and stakeholders to design reliable solutions and participated in code reviews, testing, debugging, quality improvements, deployment, and maintenance.

Software Engineer Intern Workato

I contributed to software development projects using TypeScript, React, Node.js, Express.js, and PostgreSQL. I developed and maintained frontend functionality with React and supported backend functionality and services built with Node.js.

I worked with PostgreSQL for application data and database-related development. I collaborated with engineering teams in a fast-paced technology environment and gained hands-on experience delivering full-stack product functionality.

Education

Learning history

University of California, Berkeley

Bachelor of Computer Science, Computer Science

This professional hasn’t added portfolio projects yet.

This professional hasn’t listed any services yet.

Jobs Talent AI Tools Salaries
Menu